Fly weight vs Line weight question
I must preface this question by mentioning that I did a search for this topic, but could not find anything relevant. If I missed a previous discussion, please point me in the right direction.
I am looking for some sort of correlation between the weight of the fly to be cast and the weight of the fly line. Now, I understand that the same rod that casts a 510 Scandi may require a different weight Skagit, and certainly will require a different weight mid-belly. But it seems to me that with all of the expertise on this Forum, someone must have figured out the optimum weight range for a fly, based on line weight, more scientifically than "that fly is too heavy for that line".
My purpose in asking this is that my casting ability is not so good that I can discern whether the problems I have are due to a fly that is too heavy for the line, or simply bad technique. I have taken lessons, and find myself improving after every lesson, however, for those times when I don't having a casting guru at my elbow, it would be nice to start out with a rod/line/tip/fly system in relative balance.
Thanks in advance!
I can't understand why some folks think a drink can is harder to carry out when it is empty than it was to carry in when it was full.